Type-writing machine.



S. W.'TURNER.

TYPE WRITING MACHINE.

APPLIOATION FILED JAN.31.1911.

Patented Apr. 15, 1913.

- 3 BHEETB-BHEET 1.

14:5 ATTORNEY S. W TURNER. TYPE WRITING MACHINE.

1221 101111011 FILED 11111.31. 1011.

3 SHEETS-$111121 2.

' Patented Apr. 15, 1913.

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TYPE WRITING MACHINE.

APPLIOATION FILED 1111.31, 1911.

1,058,531 5, Patentd Apr. 15, 1913.

3 SHEETS-BHEET 3.

WITNESSES: WWW NVENTDR: I

M I .9. mZM R ZMW I 1-ll5 ATTURNEY 1 UNITED STATES raTENT orriou.

SAMUEL WTLLIAH TURNER, OF CANONBURY, LONDON, ENGLAND, ASSIGNOR T0 YOSTWRITING MACHINE COMPANY, OF ILION, NEW YORK,

YORK.

TYPE-WRITING MACHINE.

A CORPORATION OF NEW Specification of Letters Fatent. Patented Apr. 15,1913.

i Application filed January 31, 1911. Serial Np. 605,732.

To all whom it may concern:

Be it. known that I, SAMUEL VViLLIAM TURNER, subject of the King ofGreat Britain and Ireland, residing at 11 Douglas road, Canonbury, inthe county of London, England, have invented new and useful Improvementsin Type-\Vriting Machines, of which the following is a specification.

This invent-ion'relates to typewriting machines, and has for its objectimprovements in the arrangement. and construction of escapementmechanismfor the platen carriage, whereby the letter spacing can be effected intwo different spacing increments. These features in a typewrit-ingmachine are specially useful in the case of writing Turkish and Arabicowing to the difliculty with which such writing is performed as comparedwith that of ordinary modernlanguages.

The invention consists in certain features of construction andcombinations and arrangements of parts, all of which will be fully setforth herein and particularly pointed out in the claims.

In order that the invention may be the better understood, 1 will nowproceed to describe the same'in relation to the accompanying drawings,reference being had to the letters and figures marked thereon.

Like letters refer to like parts in the various figures.

Figure 1 is a part sectional side elevation of the lower part of atypewriter with my invention applied thereto, the detachable part of thecarriage being removed. Fig. 2 is a rear sectional elevation of thesame. Fig. 3 is a view showing the two universal bars and two keys forletters requiring different spacing. Fig. 4 is a plan showing the twouniversal bars and their connection with the escapement mechanism. Figs.5, 6, 7

and 8 are detail views showing the various positions of the escapementmechanismfor different spacing. Fig. 9 a detail viewof the two racks andescapement pinion. Fig. 10 is an end view of thecarriage and platenmechanism showing the operative means for drawing one rack out ofengagement with the escapement. pinion. Fig. 11 is a. similar view atthe opposite end of the carriage, showing the method of withdrawing )heother rack out of engagement with the es ca ementpinion.

v he escapement is of the rotary type and engages with the carriage bymeans of a pinion co-acting with a rack carried by the carriage.

According to this invention I provide two racks a and b, one on eachside of the pinion c the said racks being alternately rocked intoengagement with the escapement pinion at the will of the operator.

Therack ais pivoted on the carriage on screws a? and is provided with abent. arm a. The disengaging movementof the rack about the axis of thescrew a is'ef'fected by means i of a thumb lever a pivoted at q andhaving a projecting pin a which engages with the bent arm a Springs aare provided to return the rack a into its operative position.

The thumb lever a is maintained in the position shown in the drawings bymeans of a pivoted detent a so as to maintain the rack at out ofengagement with the pinion c.

The rack b is pivoted to the carri age frame by means of screws Z2 andis operated by means of a. thumb lever 12 pivotedto the frame by a screw6 the lower end of the lever 72 engaging with an upwardly projecting ribb. .The thumb lever b is main- I tained in its actuated position bymeans of a pivoted detent b which en ages with the upper, end of thelever 12?. provided to return the rack 1) into its operative position.

\Vhen a particular direction of travel of the carriage'is desired, theoperator by regulating the position of the thumb levers a and Fallowseither one or other rack a or b to come into operative connection withthe escapement pinion 0 according tothe direction of travel of thecarriage desired; the racks being on the opposite sides of the pinion c,permits motion of the carriage (l in either direction although thepinion has a uni-directional motion.

From the above description it will be obvious that when one of the keysand b is locked by its latch a or b, the other of said keys becomes arelease key for the carriage.

In operating the carriage (Z I use a single spring drum d, the cord (Zof which passes gprings b are around a pulley or snatch block it and isatd or to the main frame of the machine at d and in this way the springexerts apull .motion under the action of the spring drum from right toleft as viewed in said figure; whereas if the pulley or snatch block (Zis attached to the carriage at d, the carriage will then have a motionfrom left to right as viewed in Fig. 2 which is a. rear view.

The differential spacing is obtained by means of two escapeniont wheels6 and f, co-

=axially arranged on the shaft 9 which is driven by the pinion 0 throughthe intermediation of a clutch 0 in combination with an oscillating dog6 adapted to move in a fixed plane and an auxiliary loose dog 0 adaptedto have motion in two directions. 7

The escapeinent wheel 6 is rigidly fixed to v the shaft 9 while theescapement wheel f is loosely mounted upon the same and is per mitted torevolve freely through a fixed are controlled by stops f carried by theshaft 9 or by the fixed escapement wheel a.

In the form illustrated in the drawings, the stops f comprise acircumferential slot f arrangedin the boss of the wheel f, and a screw9* rigidly fixed in the shaft The eseapement wheel f is spring pressedin relation to the fixed escapement wheel 6 in one direction by means ofthe spiral s ring eflflthe amount of movement being limited by the stopsf hereinbefore described. The dog 6 is adapted to engage both the wheelse and f.

When a key button It is depressed for which a long space is required,the key lever h at the same time depresses a universal bar k whichoperates the dog trunnion [L3 so as to throw out the dog 6 from engage'ment with the loose wheel f and throw it into engagement with the fixedwheel (2 which is shown'in Figs. 5 and 7. T he loose wheel f thenadvances the full space under spring action and on the removal of thefinger of the operator from the key button the dog e returns toengagement with the loose wheel 7 and releases the fixed wheel 6 and thecarriage advances the distance of the long space.

In order to deal with the short space a second universal bar j isarranged by which the auxiliary pivoted loose dog 6 is raised so as totrip past one tooth only of the escapement and thus permit a short spacemovement when the key button Z is depressed, thecharacter of whichrequires only a short spaceto be used. I i

By reference to Figs. 3, 6 and 8 it will be seen that. the movement ofthe auxiliary universal bar, j throws up the auxiliary loose dog. e' finto the, loose wheel 7 and by further depression ofthe key lever theordinary universal bar If is depressed (see Fig. 3;} and the fixed dog ais thrown up l'roni the lower loose wheel f into the fixed whorl c thelower loose wheel f rotates under the action of the spring 0 until theloose dog a contacts with its stop 0, thus when the liu ger of theoperator is removed from the key button Z andthe dog 6 again engageswith the loose wheel f, the wheel a only permits the advance of thecarriage for a short space. Upon the release of the dog 1 l'roni ihewheel f, the dog moves back into contact with the stop (2 under the aciin oi" the spring e It willbe understood that the ordinary space keyopt-rates the escapmnent in the same manner as a long space luflv leverand in addition thereto 1 provide a short span key lever in adapted toco-act with both universal bars j and it.

The operation of my machine is as fol- 'lows: l or writing ordinaryihahir: or

Turkish, the pulley al is attached in the frame of the niaclunc at d,the thumb lever B is actuated and maintained. in position l a detent b,the thumb lever M lmlni? used as a rclcasc key in the usual way. thecar-- riage now moves from left to right under control of thecscapcnicut mechanism. the line of writing reading from right to loll.

In order that figures may be written it is necessary to'reverse thedirection of the line of writing. the pulley d is therefore at tached tothe carriage at ii. the thumb lever b is permitted to resume its normal(OiHlltion and the thumb lever (.6 is drawn toward the operator andmaintained in position by the detent a, the lover I) being used as theordinary release lever.

It will be seen that by the use oi. a unidirectional escapeinent' andescapcuient piir ion, it is possible to retain all the usual de vicescommon to typewriting machine cw capeinents, such as back spacingdevices and. the like.

The means whereby the carriage feed is made reversible is not claii'nedherein but is claimed in a divisional case filed September -7, 1912,Serial'No. 719,066, patented January 14, 1913, No, 1,050,315.

Having thus fully described my invention I claim as new and desire tosecure by Let.- ters Patent I 1. In a typewriting machine in combinationa platen carriage, a fixed escapeinent wheel and a loose escapenicntwheel on the escapenient axle the loose escapcment wheel having alimited free motion on said axle, a main universal bar having connectedtherewith a dog adapted to move at right angles to the plane ofrevolution of the cscapcment wheel, an auxiliary universal bar havingconnected therewith a dog adapted to move atright angles to the plane ofrevolution of its escapement wheel and also for a limited distanceparallel to said plane of revolution,

key levers, and operative means on said key cording'as to Whether doubleor single 8 acmg motion of the escapement is require for the particularcharacter used.

.2. In a typewriting machine, the combination of a 'carria e,'anescapement rack connected with sai carriage, a second escapement rackhaving a limited freedom of motion with reference to the first recitedrack,' afldog for engagement with said two racks alternately to efi'ectthe feed of the carriage, a series of keys, means operated by said keysfor rating said dog, and'a second dog mova 1y mounted on a relativelyfixed part of the machine and operated b certain of said keys intoengagement wit said relatively movable rack and operating further tolimit such freedom ofmotion of said rack. a

3. In a typewriting machine, the combination of a carriage, a toothedrack connected to move in unison with said carriage, a second toothedrack having freedom of mot-ion with respect to the first rack; suchfreedom of motion being limited to a 'plurality of teeth of the firstrack, a dog for engagement with said two racks alternately to controlthe 'feed of said cairi'age, a series of keys, means whereb saidkeys-operate said dog', and a second 0g operated by certain of keys andmoved thereby into engagement with the teeth oi said relatively movablerack'to limit the freedom of mo tion of said relatively movable rack toless than/ said plurality of teeth.

4.! In a typewnting machine, the combination with a carriage, ofescapement mechanism for controlling variably and inter mittently thespacing of the carriage, said mechanism comprising an escapement rackconnected to move in unison with said carriage, a second rack havingfreedom of motion with respect to the first rack, means for engagementwith said two racks alternately to control the feed of said carriage,and means for variably limiting the. extent of freedom of relativemotion between the two racks in order to vary the extent of movementimparted to the carriage at each aetuation of the'escapement mechanism,the last recited means including a reciprocatory dog ada ted forengagement with said second me and havin freedom 'of motion with saidsecond rac less than the maximum freedom of motion of said second rack.

. In testimony whereof I have. signed my name to this specification inthe presence of two subscribing witnesses.

' SAMUEL WILLIAM TURNER.

' Witnesses:

- WALTER CARVER,

Case. R. BULLOUGH.

